diff --git a/package-lock.json b/package-lock.json
index 04af9ee..df8dd4c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,7 +1,8 @@
 {
   "name": "paper-datepicker",
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       "dev": true
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-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
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@@ -378,12 +422,27 @@
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       "dev": true
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@@ -398,12 +457,49 @@
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+      "dev": true,
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+          "dev": true,
+          "requires": {
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+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.3.tgz",
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+      "dev": true,
+      "requires": {
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+        "braces": "~3.0.2",
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@@ -416,27 +512,61 @@
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+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
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+        "strip-ansi": "^6.0.0",
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@@ -489,6 +669,26 @@
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+      "dev": true,
+      "requires": {
+        "cliui": "^7.0.2",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.0",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^20.2.2"
+      }
+    },
+    "yargs-parser": {
+      "version": "20.2.4",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.4.tgz",
+      "integrity": "sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA==",
+      "dev": true
+    },
+    "yargs-unparser": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
+      "integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^6.0.0",
+        "decamelize": "^4.0.0",
+        "flat": "^5.0.2",
+        "is-plain-obj": "^2.1.0"
+      }
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
       "dev": true
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   }
diff --git a/package.json b/package.json
index 75782ba..99cb378 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "@polymer/test-fixture": "^4.0.2",
     "@webcomponents/webcomponentsjs": "^2.0.0",
     "chai": "^4.2.0",
-    "mocha": "^5.2.0",
+    "mocha": "^10.2.0",
     "wct-mocha": "^1.0.0-pre.3"
   }
 }
\ No newline at end of file